Remember two years ago when some scientists announced[8] that marijuana causes psychosis and the press, along with the entire nation of Great Britain, went borderline psycho just from thinking about it?

Well, Paul Armentano at NORML reports[9] that a new study[10] has proven that the whole thing was just a bunch of crazy talk:

“[T]he expected rise in diagnoses of schizophrenia and psychoses did not occur over a 10 year period. This study does not therefore support the specific causal link between cannabis use and incidence of psychotic disorders. … This concurs with other reports indicating that increases in population cannabis use have not been followed by increases in psychotic incidence.”

In non-sciency terms, this means that when rates of marijuana use go up, rates of mental illness do not. Therefore, we can conclude that marijuana apparently doesn't cause anyone to develop psychosis who otherwise wouldn’t have.